Scorpion/Curtisbuilt roller rockers....
Thread Starter
Joined: Sep 2004
Posts: 3,212
Likes: 1,612
From: Michigan & Florida
Scorpion/Curtisbuilt roller rockers.... Has anyone tried either one of these brands of roller rockers? More importantly, has anyone who HAS tried either kind had success and/or would they buy them over again if given this option? I am going to buy some roller rockers soon, and if money were no object, I am sure that many of us would run the Jesel's. But since money IS an object for the majority of us, me included, I am having a hard time deciding on what brand/style I should go with. Thanks in advance, guys.
I have seen a few broken Scorpion's. Unfortunately when they break, the person who posted the problem typically never comes back with an explanation as to why so you don't know if it was the rocker or the installation. I have used the Cranes and the Yella Terra's. They are both very high quality setups. Cranes are fully adjustable and the YT's are a pedestal setup with two rockers sharing one shaft. The Curtisbuilt you mention I believe are a different pedestal setup based on the use of the Comp rockers. They may the shaft setup and use Comp rockers.
Thread Starter
Joined: Sep 2004
Posts: 3,212
Likes: 1,612
From: Michigan & Florida
I have seen a few broken Scorpion's. Unfortunately when they break, the person who posted the problem typically never comes back with an explanation as to why so you don't know if it was the rocker or the installation. I have used the Cranes and the Yella Terra's. They are both very high quality setups. Cranes are fully adjustable and the YT's are a pedestal setup with two rockers sharing one shaft. The Curtisbuilt you mention I believe are a different pedestal setup based on the use of the Comp rockers. They may the shaft setup and use Comp rockers.
FormerVendor
Joined: Nov 2001
Posts: 3,065
Likes: 6
From: Houston, Tx.
I think the Scorpions had a bad batch in the beginning of their production and indeed some of them did break but that was supposedly corrected. I have one customer I know of that had that problem too. The others we have used and seen on many different deals from other shops here on LS1tech seem to have been doing great though.
The Scorpions probably have some of the best bolt-on geometry of the rockers I've seen so far and checked.
I got a set of the curtis-built rockers for inspection amd mockup and was impressed with them as well and they were very robust but I never got to use them although they did seem like a very nice design that would work great. I can't remember if they were a direct bolt-on but I thought they were as well.
The Scorpions probably have some of the best bolt-on geometry of the rockers I've seen so far and checked.
I got a set of the curtis-built rockers for inspection amd mockup and was impressed with them as well and they were very robust but I never got to use them although they did seem like a very nice design that would work great. I can't remember if they were a direct bolt-on but I thought they were as well.
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stainless steel would be great for strength, but with the cam profiles we use in these motors with the large amount of extra valve train weight SS would add you would likely hit valve float pretty quick. ideally something stupid strong that weighs almost nothing is what we need (and has the correct geometry)
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Verdad Gallardo Crane has a nice shaft mount, but they require a lot of head modifications to run them. Arkay99 had issues with the Jesel, and later found out that Jesel doesn't recommend their rocker with a non-stock cam (the non-adjustables). I looked at the Harlands, but they don't look as strong as the YT's and a few guys had problems with them getting torn up. As for the stock rockers, LPE makes a steel bar that replaces the aluminum one, it is supposed to stiffen up the assembly. I could never get a good wipe pattern from the stock rockers though, so I passed on their re-installation a long time ago.
I am running Comp Cams #1500 system in my Cad and have another set to install in Mr. Vette.
Had to shim the valve cover 1/2 inch to get them to clear, plus grind out every boss inside the valve cover.
They work bitchin though.
Had to shim the valve cover 1/2 inch to get them to clear, plus grind out every boss inside the valve cover.
They work bitchin though.
Thread Starter
Joined: Sep 2004
Posts: 3,212
Likes: 1,612
From: Michigan & Florida
Crane has a nice shaft mount, but they require a lot of head modifications to run them. Arkay99 had issues with the Jesel, and later found out that Jesel doesn't recommend their rocker with a non-stock cam (the non-adjustables). I looked at the Harlands, but they don't look as strong as the YT's and a few guys had problems with them getting torn up. As for the stock rockers, LPE makes a steel bar that replaces the aluminum one, it is supposed to stiffen up the assembly. I could never get a good wipe pattern from the stock rockers though, so I passed on their re-installation a long time ago.
Thread Starter
Joined: Sep 2004
Posts: 3,212
Likes: 1,612
From: Michigan & Florida
Thread Starter
Joined: Sep 2004
Posts: 3,212
Likes: 1,612
From: Michigan & Florida
I have seen a few broken Scorpion's. Unfortunately when they break, the person who posted the problem typically never comes back with an explanation as to why so you don't know if it was the rocker or the installation. I have used the Cranes and the Yella Terra's. They are both very high quality setups. Cranes are fully adjustable and the YT's are a pedestal setup with two rockers sharing one shaft. The Curtisbuilt you mention I believe are a different pedestal setup based on the use of the Comp rockers. They may the shaft setup and use Comp rockers.
I have the Harland Sharp shaft mount adjustable roller rockers and haven't had any trouble. Trick Flow recommends these rocker arms with there heads and Allan @ Futrals also recommended them to me. So the are now on the car!!
